f/overrides/event-backup/jawgx-dividend.csv
Greg Pomerantz bb8e39605e Event-history protection: backup dir, empty-download fallback, docs
Yahoo's 2026 event-feed change (capitalGain events dropped for some
funds; no events at all for terminated tickers) can wipe good event
history on re-download. Defense in depth:

- overrides/event-backup/: last-known-good copy of every dividend/
  capitalGain file (8,192 files, 58 MB); refresh with
  scripts/backup_events.py after each dump update
- data.py event_file(): frozen > data-root (while populated) > backup;
  used by panel reads, verify_official, and the double-listing scanner
- README: capital-gain files are mutual-fund-only in this dump; Yahoo
  has no LT/ST split (tax.py taxes capg at lt_rate; the per-fund split
  would come from fund-company annual tax statements or commercial feeds)
- tests: exact Timestamp .loc keys (pandas 3.x string matching returns a
  Series on large DatetimeIndex)
2026-08-31 21:59:25 -04:00

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Date,Dividends
1996-12-30,0.100000
2005-06-29,0.222000
2007-06-28,0.151000
2021-06-10,3.452000
2006-12-28,0.197000
2012-12-07,0.143000
1994-06-29,0.002000
2021-12-09,0.179000
2024-12-12,0.196000
2026-06-16,6.862000
2008-12-29,0.142000
2013-06-26,0.313000
2014-06-19,0.279000
2024-06-13,2.570000
1995-12-28,0.050000
2013-12-09,0.112000
2025-06-12,7.206000
2003-12-30,0.064000
2004-12-30,0.141000
2014-12-08,0.160000
2018-12-10,0.257000
2023-12-14,0.216000
1997-06-27,0.141000
2009-12-11,0.146000
2015-06-19,0.178000
2017-06-28,0.262000
2018-06-22,0.341000
2019-06-10,3.573000
2022-06-15,7.030000
2025-12-11,0.154000
2004-06-29,0.123000
2016-06-21,0.308000
2011-06-29,0.063000
2017-12-11,0.124000
2023-06-21,1.899000
1995-06-29,0.009000
2006-06-29,0.326000
2020-12-10,0.194000
1997-12-30,0.050000
2008-06-27,0.203000
2016-12-12,0.125000
2019-12-09,0.236000
2020-06-11,3.203000
2007-12-27,0.119000
2009-06-19,0.171000
2022-12-08,0.246000
1998-06-29,0.140000
2015-12-07,0.102000
1993-12-30,0.020000
1996-06-27,0.074000
2005-12-29,0.150000
2010-06-29,0.126000
2011-12-09,0.110000
2012-06-27,0.109000
2003-06-27,0.186000
2010-12-10,0.042000